JPS6426166A - Ship speed detecting device - Google Patents

Ship speed detecting device

Info

Publication number
JPS6426166A
JPS6426166A JP62260122A JP26012287A JPS6426166A JP S6426166 A JPS6426166 A JP S6426166A JP 62260122 A JP62260122 A JP 62260122A JP 26012287 A JP26012287 A JP 26012287A JP S6426166 A JPS6426166 A JP S6426166A
Authority
JP
Japan
Prior art keywords
pressure
value
ship
speed
movement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP62260122A
Other languages
Japanese (ja)
Other versions
JP2588730B2 (en
Inventor
Tomoji Nakamura
Ryoji Sawada
Kazuhiro Nakamura
Tatsuya Yoshioka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yamaha Marine Co Ltd
Yamaha Motor Co Ltd
Original Assignee
Yamaha Motor Co Ltd
Sanshin Kogyo KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yamaha Motor Co Ltd, Sanshin Kogyo KK filed Critical Yamaha Motor Co Ltd
Priority to JP62260122A priority Critical patent/JP2588730B2/en
Priority to US07/164,513 priority patent/US4916644A/en
Publication of JPS6426166A publication Critical patent/JPS6426166A/en
Application granted granted Critical
Publication of JP2588730B2 publication Critical patent/JP2588730B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/14—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

PURPOSE:To eliminate the influence of the atmospheric pressure being different due to a meteorological condition and altitude, etc., by calculating a ship speed, based on a difference between pressure applied to a semiconductor pressure sensor at the time of stop, and pressure applied to the semiconductor pressure sensor at the time of movement. CONSTITUTION:A reference value setting means 4 stores pressure applied to an opening 35 at the time when a ship is stopped, as a reference value. A speed operating means 5 inputs a digital voltage signal from an ADC 2, and first of all, subtracts said reference value from its value. The value which has been derived in such a way corresponds to a pressure value obtained by subtracting the atmospheric pressure from the pressure applied to the opening 35, namely, dynamic pressure generated due to a movement of the ship, and subsequently, a speed operating means 5 calculates a vessel speed from this value. In such a way, only a value corresponding to the dynamic pressure based on the movement of the vessel can be fetched purely, and an exact ship speed can be derived.
JP62260122A 1987-03-06 1987-10-15 Ship speed detector Expired - Lifetime JP2588730B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP62260122A JP2588730B2 (en) 1987-03-06 1987-10-15 Ship speed detector
US07/164,513 US4916644A (en) 1987-03-06 1988-03-07 Running speed detecting device for marine vessels

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP5030787 1987-03-06
JP62-50307 1987-03-06
JP62260122A JP2588730B2 (en) 1987-03-06 1987-10-15 Ship speed detector

Publications (2)

Publication Number Publication Date
JPS6426166A true JPS6426166A (en) 1989-01-27
JP2588730B2 JP2588730B2 (en) 1997-03-12

Family

ID=26390771

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62260122A Expired - Lifetime JP2588730B2 (en) 1987-03-06 1987-10-15 Ship speed detector

Country Status (2)

Country Link
US (1) US4916644A (en)
JP (1) JP2588730B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3118013B2 (en) * 1991-04-02 2000-12-18 三信工業株式会社 Ship speed measurement system for ship propulsion
US5544076A (en) * 1994-08-19 1996-08-06 Airguide Instrument Company Marine speedometer
US5583289A (en) * 1994-08-19 1996-12-10 Airguide Instrument Company Marine velocity detection device with channel to wash out debris

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54151463A (en) * 1978-05-19 1979-11-28 Cosmo Instr Co Ltd Automatic zero compensating device
JPS61137273U (en) * 1985-02-18 1986-08-26

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE307860B (en) * 1964-04-16 1969-01-20 Kockums Mekaniska Verkstads Ab
US4068207A (en) * 1973-06-01 1978-01-10 Jungner Instrument Ab Acoustic log
US3881094A (en) * 1973-07-05 1975-04-29 Velcon Filters Signal for evaluating sailboat performance
US3875388A (en) * 1973-11-05 1975-04-01 Velcon Filters Modular system for evaluating sailboat performance
SE388057B (en) * 1974-09-25 1976-09-20 Jungner Instrument Ab PROCEDURE AND DEVICE FOR MEASURING THE SPEED OF AN OBJECT RELATIVELY A REFERENCE
US4071898A (en) * 1976-06-14 1978-01-31 Sun Shipbuilding & Dry Dock Company Ship performance analyzer
DE2628336C2 (en) * 1976-06-24 1984-07-05 Fried. Krupp Gmbh, 4300 Essen Device for measuring the flow velocity
DE2856032A1 (en) * 1978-01-03 1979-07-12 Coulthard John DEVICE AND METHOD FOR MEASURING THE SPEED OF A RELATIVE MOVEMENT BETWEEN A FIRST BODY AND A SECOND BODY, respectively. A MEANS OF FLOW
US4244026A (en) * 1978-11-06 1981-01-06 General Electric Company Velocity measuring correlation sonar
US4205552A (en) * 1978-12-19 1980-06-03 Refoy Brian G Electronic speedometer for marine craft
US4409827A (en) * 1982-01-26 1983-10-18 Overs Ronald R Combined marine instrument and display therefor
US4622850A (en) * 1985-05-10 1986-11-18 Gaffrig James W Marine pitot tube
US4759216A (en) * 1986-12-01 1988-07-26 Mi Inc. Pressure-actuated electrical speedometer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54151463A (en) * 1978-05-19 1979-11-28 Cosmo Instr Co Ltd Automatic zero compensating device
JPS61137273U (en) * 1985-02-18 1986-08-26

Also Published As

Publication number Publication date
JP2588730B2 (en) 1997-03-12
US4916644A (en) 1990-04-10

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